, k rate coefficient Numerical constant in a rate-of-reaction (v) equation; for example, v = k [A]a[B]b.......where [A], [B] etc. are reactant concentrations, k is the rate constant, and a, b, etc. ar [..]

A rate constant is a proportionality constant that appears in a rate law. For example, k is the rate constant in the rate law d[A]/dt = k[A]. Rate constants are independent of concentration but depend [..]

a constant in the exponent of an equation of exponential decay that determines the how fast the dependent variable (for example, chance of quitting) changes with respect to the independent variable (f [..]

The parameter k in the rate equation. Sometimes referred to as the rate coefficient on the grounds that it can be temperature dependent and therefore not a true constant. The dimensions of k depend on the reaction order. Zeroth order rate constant: [k] = [concentration] [time–1]. First order rate constant: [k] = [time–1] e.g. s–1 Second order rate [..]

A parameter that relates the rate of product formation in a chemical reaction) to the concentrations of the various reactants. The symbol k is most common, but other symbols (e.g. q) are also used. Also called rate parameter.

, k (SI unit: s-1 (dm3 mol-1)n-1) See order of reaction

the proportionality constant in the relationship between reaction rate and concentrations of reactants.